CN111763416B - Water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material and preparation method thereof - Google Patents
Water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material and preparation method thereof Download PDFInfo
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- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- C08J2203/00—Foams characterized by the expanding agent
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- C08J2431/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
- C08J2431/02—Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J2431/04—Homopolymers or copolymers of vinyl acetate
Abstract
The application discloses water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material and a preparation method thereof, wherein the material comprises a component A and a component B, and the component A comprises: isocyanate: 210-230 parts by weight, 7-14 parts by weight of polyvinyl acetate, and a solvent: 4-10 parts by weight of a foaming agent: 0-10 parts by weight, wherein the component B comprises: polymer polyol: 100 parts by weight of a plasticizer: 20-25 parts by weight of chain extender: 10-27 parts by weight of foaming agent: 0-10 parts by weight of a foam stabilizer: 1-2 parts by weight of catalyst: 1 to 1.5 parts by weight. The preparation method comprises the following steps: and mixing the component A and the component B in proportion and then uniformly stirring to obtain the composition. The water-resistant sealing material has good water-resistant dispersibility, is not easy to disperse by water in a flowing water body, has high strength, has pure foam compressive strength not less than 2MPa, good durability, adjustable curing time and low price, is suitable for blocking water gushing and jet flow, and has good economical efficiency, safety and environmental protection.
Description
Technical Field
The application belongs to the technical field of composite materials, and particularly relates to a water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material and a preparation method thereof.
Background
The tunnel and mine engineering often encounter the phenomenon of water inrush, easily cause disasters such as surrounding rock instability, slope collapse and the like, not only cause casualties, property loss and construction period delay, but also influence the long-term stability of the engineering structure, worsen construction conditions and destroy the surrounding ecological environment. The grouting water-stopping reinforcement technology is one of the most common and effective means for improving the mechanical properties and stability of a loose or water-bearing stratum and preventing and treating collapse, leakage, gushing water, mud burst, quicksand and the like.
At present, the commonly used grouting materials mainly include cement-based inorganic grouting materials, urea-formaldehyde resin grouting materials, acrylamide grouting materials, epoxy resin grouting materials, polyurethane grouting materials and other high-molecular organic grouting materials. The cement-based grouting material is easy to obtain, low in cost, high in strength of the stone body and good in anti-permeability performance, and is suitable for large-batch grouting of broken rock bodies with large cracks; but the gel time is long, the gel is easy to run off and waste, the injectability is poor, the strength is increased slowly, the calculus rate is low, the water dispersibility is poor, and the gel is difficult to be used for treating gushing water; the urea-formaldehyde resin grouting material has low strength and poor durability; acrylamide grouting materials have high toxicity; the epoxy resin grouting material has high cost, high viscosity and poor grouting property. In contrast, the polyurethane grouting material has the advantages of higher strength, short and adjustable curing time, convenient and rapid construction, low viscosity, good fluidity, high permeability, high expansion rate, large lifting force, strong capabilities of anti-permeability, leaking stoppage, reinforcement and the like, is a novel water-stopping reinforcing grouting material with excellent comprehensive performance, and is gradually widely applied.
The polyurethane grouting material can be divided into water reactivity and non-water reactivity, the water-reactive polyurethane slurry expands and solidifies when meeting water, is suitable for conventional plugging treatment, but is easy to disperse by water and difficult to plug gushing water or jet flow, and the curing process needs the characteristics of water participation reaction and easy hydrolysis of a solidified body, so that the strength and durability of the polyurethane grouting material are poor, and the polyurethane grouting material has potential threat to the long-term stability of engineering; the non-aqueous reactive polyurethane slurry has good hydrophobicity and hydrolysis resistance stability, stable performance, is not influenced by the water content of the grouting environment, is suitable for blocking gushing water or jet flow, still has the problem of poor water dispersibility, and is easy to cause pollution to water sources and surrounding ecological environments.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the technical problem to be solved by the application is to provide the water-resistant dispersion type polyurethane rigid foam grouting water-stopping reinforcing material.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides a water-resistant dispersion type polyurethane rigid foam grouting water stop reinforcing material, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:
isocyanate: 210 to 230 parts by weight of a surfactant,
7-14 parts by weight of polyvinyl acetate,
solvent: 4 to 10 parts by weight of a surfactant,
foaming agent: 0 to 10 parts by weight of a surfactant,
the component B comprises the following components in parts by weight:
polymer polyol: 100 parts by weight of a water-soluble polymer,
plasticizer: 20 to 25 parts by weight of a surfactant,
chain extender: 10 to 27 parts by weight of a surfactant,
foaming agent: 0 to 10 parts by weight of a surfactant,
foam stabilizer: 1 to 2 parts by weight of a surfactant,
catalyst: 1 to 1.5 parts by weight.
Further, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material is prepared by mixing one or more of Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), carbodiimide modified MDI (liquefied MDI), polymethylene polyphenyl isocyanate (PAPI), dicyclohexylmethane diisocyanate (HMDI) or Hexamethylene Diisocyanate (HDI) in any proportion, wherein the NCO content is 25-50%, the average functionality is 2.4-3.0, the viscosity at 25 ℃ is less than 500mPa & s, and the melting point is less than 20 ℃.
Further, the solvent is a cyclic ester compound, is one or a mixture of more of gamma-butyrolactone (GBL), gamma-valerolactone (GVL), epsilon-caprolactone (ECL), Ethylene Carbonate (EC), Propylene Carbonate (PC) and the like in any proportion, and has a melting point of less than 20 ℃.
Further, the above-mentioned water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material is characterized in that the foaming agent is a hydrochlorofluorocarbon compound and a pentane compound with small Ozone Depletion Potential (ODP) and Global Warming Potential (GWP), and is a mixture of one or more of 1-chloro-1, 1-difluoroethane (HCFC-142b), 1-fluoro-1, 1-dichloroethane (HCFC-141b), 1-chloro-3, 3, 3-trifluoropropene (HCFC-1233 zd), n-pentane, isopentane and cyclopentane in any proportion.
Further, in the above water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material, the polymer polyol is one or a mixture of more of polyether polyol, polyester polyol, polyurea polyol, polyolefin polyol, graft polyol, hyperbranched polyol, bio-based polyol and the like in any proportion; the polyol has an average functionality of 3 to 8, an average molecular weight of 400-4000 and a hydroxyl value of 400 to 850mg KOH/g.
Further, the above-mentioned water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material, wherein the plasticizer is an ester compound, and is one or a mixture of more of dioctyl adipate (DOA), dioctyl sebacate (DOS), dioctyl phthalate (DOP), dioctyl terephthalate (DOTP), didecyl phthalate (DIDP), trioctyl trimellitate (TOTM), tridecyl trimellitate (TDTM), acetyl tributyl citrate (ATBC), 2, 4-trimethyl-1-3-pentanediol diisobutyrate (TXIB), and the like.
Further, in the above-mentioned water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material, the chain extender is a small-molecular polyol compound, and is one or a mixture of more of Ethylene Glycol (EG), diethylene glycol (DEG), 1, 2-Propylene Glycol (PG), dipropylene glycol (DPG), 1, 4-Butanediol (BDO), neopentyl glycol (NPG), 1, 6-Hexanediol (HDO), Glycerol (GLY), Trimethylolpropane (TMP), and the like in any proportion.
Further, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material is characterized in that the foam stabilizer is an organic silicon surfactant.
Further, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material is characterized in that the catalyst is a tertiary amine compound, and the catalyst is: one or more of N, N-Dimethylcyclohexylamine (DMCHA), triethylene diamine (TEDA), hexamethylene tetramine (HMTA), pentamethyldiethylene triamine (PMDETA), tetramethylethylene diamine (TMEDA), N-dimethylbenzylamine (BDMA), etc. in any proportion.
Further, the water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material is characterized in that the mass ratio of the component A to the component B is 1: 1-2.5: 1.
The application also provides a preparation method of the water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material, which comprises the following steps:
when the component A is prepared, firstly, dissolving 7-14 parts by weight of polyvinyl acetate in 4-10 parts by weight of solvent, then mixing and stirring uniformly with 210-230 parts by weight of isocyanate, finally adding 0-10 parts by weight of foaming agent, mixing and stirring until the mixture becomes uniform transparent liquid, and obtaining the component A;
when the component B is prepared, adding 100 parts by weight of polymer polyol, 20-25 parts by weight of plasticizer, 10-27 parts by weight of chain extender, 1-2 parts by weight of foam stabilizer and 1-1.5 parts by weight of catalyst into a mixer, mixing and stirring uniformly, adding 0-10 parts by weight of foaming agent, mixing and stirring until the mixture becomes uniform transparent liquid to obtain the component B;
when the waterproof dispersion type polyurethane rigid foam grouting water-stop reinforcing material is used, the component A and the component B are mixed in proportion and then are uniformly stirred, and the waterproof dispersion type polyurethane rigid foam grouting water-stop reinforcing material can be obtained.
When dissolving polyvinyl acetate (PVAC) by using a solvent, heating the solvent to 50-90 ℃ and keeping the temperature to be not lower than 50 ℃, adding polyvinyl acetate into the solvent while stirring until the mixture becomes homogeneous and particle-free semitransparent high-viscosity liquid, or adding the polyvinyl acetate into the solvent at normal temperature and sealing and standing the mixture for 24-120 hours in an environment of not lower than 20 ℃ to obtain the semitransparent high-viscosity liquid; when the polyvinyl acetate solution is added into the isocyanate, the polyvinyl acetate solution and the isocyanate are heated to be above 40 ℃ in advance, preferably, the polyvinyl acetate solution is heated to be above 60 ℃, the preheated polyvinyl acetate solution is added into the preheated isocyanate while stirring, and the mixture is continuously stirred after the polyvinyl acetate solution is added until the mixture is converted into transparent dark liquid; the foaming agent is added into one of the component A and the component B or respectively added into the component A and the component B, preferably, if the used foaming agent is difficult to be mutually soluble with isocyanate or the component A is added to cause the viscosity of the component A to be increased or polyvinyl acetate to be separated out, the foaming agent is added into the component B, if the used foaming agent is mutually soluble with the isocyanate and the component A is added to cause no viscosity increase of the component A and polyvinyl acetate to be separated out, the foaming agent is added (or relatively more added) into the component with relatively higher viscosity when the foaming agent is not added, so that the viscosity of the component A and the viscosity of the component B are as close as possible after the foaming agent is added.
Compared with the prior art, the method has the following technical effects:
(1) according to the water-resistant dispersion type polyurethane grouting and water-stopping reinforcing material, the viscosity of the slurry is increased through the physical change of polyvinyl acetate precipitation after the component A and the component B are mixed, so that the water-resistant dispersion performance of the slurry is improved, compared with the traditional water-resistant dispersion type polyurethane grouting and water-stopping reinforcing material which is obtained by directly adding a tackifier, a filler and resin into the component A or the component B to increase the viscosity of the component A or the component B, the viscosity of the component A and the viscosity of the component B of the water-resistant dispersion type polyurethane hard foam grouting and water-stopping reinforcing material are lower, and the viscosity of the mixture begins to increase only after the component A and the component B are contacted, so that the energy consumption is lower in the grouting process by using a grouting pump, and the component A and the component B are more easily mixed; compared with the traditional water-dispersion-resistant polyurethane grouting water-stop reinforcing material which increases the viscosity of slurry rapidly by accelerating the gel reaction, the water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material has the advantages that the physical change of polyvinyl acetate precipitation is milder and more controllable, no obvious heat release exists, the excessive curing speed of the slurry and the overheating of the slurry can not be caused, and the sufficient grouting operation time and the construction safety are ensured.
(2) The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material has good water-dispersion resistance, is not easily dispersed by water in a flowing water body, is high in strength, good in durability, adjustable in curing time and low in price, is suitable for blocking water gushing and jet flow, and has good economical efficiency, safety and environmental friendliness.
(3) This application is through the physics and the chemical synergism of each raw materials, guarantees the water-resistant dispersibility and the insensitivity of thick liquid in aquatic slip casting process, and then plays stagnant water and reinforced effect, can be applied to the shutoff engineering of tunnel gushing water suddenly.
Detailed Description
The conception, specific structure, and technical effects of the present application will be further described below to fully understand the purpose, features, and effects of the present application.
The starting materials used in the following examples are commercial industrial-grade chemical raw materials unless otherwise specified.
The data in the following examples were obtained using the following conditions: the compressive strength of the foam body of the polyurethane foam is tested according to the national standard GB/T1041 and 2008 'determination of plastic compression performance'; the water dispersibility of the polyurethane slurry was evaluated as follows: 100mL of water is injected into a 200mL transparent plastic cup, about 20g of uniformly stirred polyurethane slurry is slowly and continuously poured into the cup, the dispersion of the slurry and the turbidity of a water body are observed, if the slurry is poured into the water, the water is clear, and the water is clear after the slurry is foamed in the water, so that the foam is not different from the foam prepared in an anhydrous environment, the foam structure is uniform, the foam is complete, the surface is smooth and full, and the slurry can be regarded as having good water-resistant dispersibility.
Example 1
The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material is prepared by the following method:
weighing 7g of propylene carbonate, adding 7g of polyvinyl acetate into the propylene carbonate, standing for 48 hours to obtain a polyvinyl acetate solution, heating the prepared polyvinyl acetate solution to 60 ℃, pouring the polyvinyl acetate solution into 230g of polymethylene polyphenyl polyisocyanate PM200 preheated to 40 ℃ while stirring, and stirring at the rotating speed of 1800r/min for 120s to obtain a component A;
weighing 46g of polyether polyol 4110P, and adding 9g of polyether polyol HKOL-403A, 45g of polyester polyol P455N, 20g of dioctyl sebacate, 27g of dipropylene glycol, 2g of foam stabilizer BL-8468 and 1.5g of catalyst A33; stirring at the rotating speed of 1200r/min for 60s, adding 10g of monofluorodichloroethane, and continuously stirring at the rotating speed of 1200r/min for 60s to obtain a component B;
and pouring the prepared component A into the component B, and stirring at the rotating speed of 1800r/min for 20s to obtain the water-dispersion-resistant polyurethane rigid foam grouting water-stopping reinforcing material.
The compressive strength and the water dispersibility resistance of the water-dispersible polyurethane rigid foam grouting water-stop reinforcing material of the embodiment are tested, and specific test data are shown in the following table 1.
Example 2
The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material is prepared by the following method:
weighing 4g of propylene carbonate, adding 4g of ethylene carbonate and 8g of polyvinyl acetate, heating to 90 ℃, stirring with a glass rod to obtain a semitransparent homogeneous viscous liquid, pouring the liquid into 230g of polymethylene polyphenyl polyisocyanate PM200 preheated to 40 ℃ while stirring, and stirring at a rotating speed of 1800r/min for 120s to obtain a component A;
weighing 80G of polyether polyol HK-1302, and adding 20G of polyether polyol 4110G, 25G of dioctyl sebacate, 10G of glycerol, 2G of foam stabilizer BL-8468 and 1G of catalyst A33; stirring at the rotating speed of 1200r/min for 60s, adding 10g of monofluorodichloroethane, and continuously stirring at the rotating speed of 1200r/min for 60s to obtain a component B;
and pouring the prepared component A into the component B, and stirring at the rotating speed of 1800r/min for 20s to obtain the water-dispersion-resistant polyurethane rigid foam grouting water-stopping reinforcing material.
The compressive strength and the water dispersibility resistance of the water-dispersible polyurethane rigid foam grouting water-stop reinforcing material of the embodiment are tested, and specific test data are shown in the following table 1.
Example 3
The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material is prepared by the following method:
weighing 5g of propylene carbonate, adding 7g of polyvinyl acetate into the propylene carbonate, heating the mixture to 70 ℃, stirring the mixture by using a glass rod to obtain semitransparent homogeneous viscous liquid, pouring the viscous liquid into 220g of polymethylene polyphenyl polyisocyanate PM200 preheated to 40 ℃ while stirring, and stirring the mixture for 120s at the rotating speed of 1800r/min to obtain a component A;
60G of polyester polyol P455N was weighed, and 40G of polyether polyol 4110G, 20G of dioctyl terephthalate, 21.5G of neopentyl glycol, 2G of foam stabilizer BL-8468 and 1G of catalyst A33 were added thereto; stirring at the rotating speed of 1200r/min for 60s, adding 10g of monofluorodichloroethane, and continuously stirring at the rotating speed of 1200r/min for 60s to obtain a component B;
and pouring the prepared component A into the component B, and stirring at the rotating speed of 1800r/min for 20s to obtain the water-dispersion-resistant polyurethane rigid foam grouting water-stopping reinforcing material.
The compressive strength and the water dispersibility resistance of the water-dispersible polyurethane rigid foam grouting water-stop reinforcing material of the embodiment are tested, and specific test data are shown in the following table 1.
Example 4
The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material is prepared by the following method:
weighing 10g of propylene carbonate, adding 14g of polyvinyl acetate into the propylene carbonate, heating the mixture to 70 ℃, stirring the mixture by using a glass rod to obtain semitransparent homogeneous viscous liquid, pouring the viscous liquid into 210g of polymethylene polyphenyl polyisocyanate PM200 preheated to 40 ℃ while stirring, stirring the viscous liquid at the rotating speed of 1800r/min for 120s, adding 10g of monofluoro dichloroethane into the viscous liquid, and continuously stirring the viscous liquid at the rotating speed of 1200r/min for 60s to obtain a component A;
weighing 46g of polyether polyol 4110P, and adding 9g of polyether polyol HKOL-403A, 45g of polyester polyol P455N, 25g of dioctyl terephthalate, 11g of propylene glycol, 2g of foam stabilizer BL-8468 and 1.5g of catalyst A33; stirring at the rotating speed of 1200r/min for 120s to obtain a component B;
and pouring the prepared component A into the component B, and stirring at the rotating speed of 1800r/min for 20s to obtain the water-dispersion-resistant polyurethane rigid foam grouting water-stopping reinforcing material.
The compressive strength and the water dispersibility resistance of the water-dispersible polyurethane rigid foam grouting water-stop reinforcing material of the embodiment are tested, and specific test data are shown in the following table 1.
Table 1: test results of compressive strength and water dispersibility resistance of water-dispersion-resistant polyurethane rigid foam grouting water-stopping reinforcing material in different embodiments
As can be seen from the table 1, the water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material has the characteristics of good water-dispersion resistance and high compressive strength, and the compressive strength of pure foam is not less than 2MPa, so that the water-stop reinforcing material can exert a good water-stop reinforcing effect, is suitable for blocking gushing water and jet flow, and has good economy, safety and environmental protection.
The component A contains polyvinyl acetate, the component B contains an ester plasticizer, and when the component A and the component B are mixed, the ester plasticizer enables the polyvinyl acetate to be partially separated out, so that the viscosity of the mixture is rapidly increased, and the water-resistant dispersibility of the slurry is further improved.
According to the water-resistant dispersion type polyurethane grouting and water-stopping reinforcing material, the viscosity of the slurry is increased through the physical change of polyvinyl acetate precipitation after the component A and the component B are mixed, so that the water-resistant dispersion performance of the slurry is improved, compared with the traditional water-resistant dispersion type polyurethane grouting and water-stopping reinforcing material which is obtained by directly adding a tackifier, a filler and resin into the component A or the component B to increase the viscosity of the component A or the component B, the viscosity of the component A and the viscosity of the component B of the water-resistant dispersion type polyurethane hard foam grouting and water-stopping reinforcing material are lower, and the viscosity of the mixture begins to increase only after the component A and the component B are contacted, so that the energy consumption is lower in the grouting process by using a grouting pump, and the component A and the component B are more easily mixed; compared with the traditional water-dispersion-resistant polyurethane grouting water-stop reinforcing material which increases the viscosity of slurry rapidly by accelerating the gel reaction, the water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material has the advantages that the physical change of polyvinyl acetate precipitation is milder and more controllable, no obvious heat release exists, the excessive curing speed of the slurry and the overheating of the slurry can not be caused, and the sufficient grouting operation time and the construction safety are ensured. The water-dispersion-resistant polyurethane rigid foam grouting water-stop reinforcing material has good water-dispersion resistance, is not easily dispersed by water in a flowing water body, is high in strength, good in durability, adjustable in curing time and low in price, is suitable for blocking water gushing and jet flow, and has good economical efficiency, safety and environmental friendliness. This application is through the physics and the chemical synergism of each raw materials, guarantees the water-resistant dispersibility and the insensitivity of thick liquid in aquatic slip casting process, and then plays stagnant water and reinforced effect, can be applied to the shutoff engineering of tunnel gushing water suddenly.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.
Claims (6)
1. The water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight: isocyanate: 210 to 230 parts by weight of a surfactant,
7-14 parts by weight of polyvinyl acetate,
solvent: 4 to 10 parts by weight of a surfactant,
foaming agent: 0 to 10 parts by weight of a surfactant,
the component B comprises the following components in parts by weight:
polymer polyol: 100 parts by weight of a water-soluble polymer,
plasticizer: 20 to 25 parts by weight of a surfactant,
chain extender: 10 to 27 parts by weight of a surfactant,
foaming agent: 0 to 10 parts by weight of a surfactant,
foam stabilizer: 1 to 2 parts by weight of a surfactant,
catalyst: 1-1.5 parts by weight;
the mass ratio of the component A to the component B is 1: 1-2.5: 1;
the isocyanate is one or a mixture of more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, carbodiimide modified MDI, polymethylene polyphenyl isocyanate, dicyclohexylmethane diisocyanate or hexamethylene diisocyanate in any proportion, wherein the NCO content is 25-50%, the average functionality is 2.4-3.0, the viscosity at 25 ℃ is less than 500mpa & s, and the melting point is less than 20 ℃;
the polymer polyol is one or a mixture of more of polyether polyol, polyester polyol, polyurea polyol, polyolefin polyol, graft polyol, hyperbranched polyol, bio-based polyol and the like in any proportion; the average functionality of the polyol is 3-8, the average molecular weight is 400-4000, and the hydroxyl value is 400-850 mg KOH/g;
the chain extender is a micromolecular polyalcohol compound which is a mixture of one or more of ethylene glycol, diethylene glycol, 1, 2-propylene glycol, dipropylene glycol, 1, 4-butanediol, neopentyl glycol, 1, 6-hexanediol, glycerol and trimethylolpropane in any proportion;
when the component A is prepared, firstly, dissolving 7-14 parts by weight of polyvinyl acetate in 4-10 parts by weight of solvent, then mixing and stirring uniformly with 210-230 parts by weight of isocyanate, finally adding 0-10 parts by weight of foaming agent, mixing and stirring until the mixture becomes uniform transparent liquid, and obtaining the component A;
when the component B is prepared, adding 100 parts by weight of polymer polyol, 20-25 parts by weight of plasticizer, 10-27 parts by weight of chain extender, 1-2 parts by weight of foam stabilizer and 1-1.5 parts by weight of catalyst into a mixer, mixing and stirring uniformly, adding 0-10 parts by weight of foaming agent, mixing and stirring until the mixture becomes uniform transparent liquid to obtain the component B;
when the waterproof dispersion type polyurethane rigid foam grouting water-stop reinforcing material is used, the component A and the component B are mixed in proportion and then are uniformly stirred, and the waterproof dispersion type polyurethane rigid foam grouting water-stop reinforcing material can be obtained.
2. The water-resistant dispersion type polyurethane rigid foam grouting water-stop reinforcing material as claimed in claim 1, wherein the solvent is a cyclic ester compound, is one or a mixture of more of gamma-butyrolactone, gamma-valerolactone, epsilon-caprolactone, ethylene carbonate and propylene carbonate in any proportion, and has a melting point of less than 20 ℃.
3. The water-dispersing polyurethane rigid foam grouting water stop reinforcing material as claimed in claim 1 or 2, wherein the foaming agent is a hydrochlorofluorocarbon compound and a pentane compound with small ozone depletion potential and global warming potential, and is a mixture of one or more of 1-chloro-1, 1-difluoroethane, 1-fluoro-1, 1-dichloroethane, 1-chloro-3, 3, 3-trifluoropropene, n-pentane, isopentane, cyclopentane and the like in any proportion.
4. The water-dispersing-resistant polyurethane rigid foam grouting water-stop reinforcement material as claimed in claim 1, wherein the plasticizer is an ester compound, and is one or a mixture of more of dioctyl adipate, dioctyl sebacate, dioctyl phthalate, dioctyl terephthalate, didecyl phthalate, trioctyl trimellitate, tridecyl alcohol trimellitate, acetyl tributyl citrate and 2,2, 4-trimethyl-1-3-pentanediol diisobutyrate in any proportion.
5. The water-resistant dispersion type polyurethane rigid foam grouting water stop reinforcing material as claimed in claim 1,2 or 4, wherein the foam stabilizer is a silicone surfactant.
6. The water-resistant dispersion type polyurethane rigid foam grouting water stop reinforcing material as claimed in claim 1,2 or 4, wherein the catalyst is a tertiary amine compound, and is: one or more of N, N-dimethylcyclohexylamine, triethylene diamine, hexamethylene tetramine, pentamethyl diethylene triamine, tetramethyl ethylene diamine and N, N-dimethylbenzylamine in any proportion.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1167524B (en) * | 1961-11-10 | 1964-04-09 | Bayer Ag | Process for the production of impact-resistant, cross-linked moldings including the production of foams based on vinyl polymers |
| CN103025783A (en) * | 2010-06-11 | 2013-04-03 | 巴斯夫欧洲公司 | Polyurethane integral foams with good dimensional stability and high resistance |
| CN104610902A (en) * | 2015-02-12 | 2015-05-13 | 厦门誉匠复合材料有限公司 | Rapidly post-cured polyurethane hot melt adhesive and preparation method thereof |
| CN106478890A (en) * | 2016-09-22 | 2017-03-08 | 佛山市顺德区巴德富实业有限公司 | A kind of polyurethane/polyvinyl acetate hybridisation emulsion and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008514472A (en) * | 2004-09-30 | 2008-05-08 | ジェルドウィン インコーポレイテッド | Wood treatment to produce building structures and other wood products |
-
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- 2020-06-23 CN CN202010581668.5A patent/CN111763416B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1167524B (en) * | 1961-11-10 | 1964-04-09 | Bayer Ag | Process for the production of impact-resistant, cross-linked moldings including the production of foams based on vinyl polymers |
| US3357939A (en) * | 1961-11-10 | 1967-12-12 | Bayer Ag | Polyurethanes containing uretdione groups modified with vinyl polymers |
| CN103025783A (en) * | 2010-06-11 | 2013-04-03 | 巴斯夫欧洲公司 | Polyurethane integral foams with good dimensional stability and high resistance |
| CN104610902A (en) * | 2015-02-12 | 2015-05-13 | 厦门誉匠复合材料有限公司 | Rapidly post-cured polyurethane hot melt adhesive and preparation method thereof |
| CN106478890A (en) * | 2016-09-22 | 2017-03-08 | 佛山市顺德区巴德富实业有限公司 | A kind of polyurethane/polyvinyl acetate hybridisation emulsion and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 抗水分散聚氨酯泡沫注浆材料的制备及性能研究;陈大庆等;《新型建筑材料》;20200615;第47卷(第5期);第112-115,141页 * |
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